56161566005 has 12 divisors (see below), whose sum is σ = 71127614412. Its totient is φ = 42564553920.

The previous prime is 56161565951. The next prime is 56161566029. The reversal of 56161566005 is 50066516165.

It can be written as a sum of positive squares in 2 ways, for example, as 42591878884 + 13569687121 = 206378^2 + 116489^2 .

It is not a de Polignac number, because 56161566005 - 2²⁸ = 55893130549 is a prime.

It is a super-2 number, since 2×56161566005² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15555416 + ... + 15559025.

It is an arithmetic number, because the mean of its divisors is an integer number (5927301201).

Almost surely, 2^56161566005 is an apocalyptic number.

It is an amenable number.

56161566005 is a deficient number, since it is larger than the sum of its proper divisors (14966048407).

56161566005 is a wasteful number, since it uses less digits than its factorization.

56161566005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31114484 (or 31114465 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 56161566005 in words is "fifty-six billion, one hundred sixty-one million, five hundred sixty-six thousand, five".